do not drink alcohol in excess with cialis. side effects may include headache, upset stomach, delayed backache or muscle ache. to avoid long-term injury, seek immediate medical help for an erection lasting more than four hours. if you have any sudden decrease or loss in hearing or vision, or if you have any allergic reactions such as rash, hives, swelling of the lips, tongue or throat, or difficulty breathing or swallowing, stop taking cialis and get medical help right away. ask your doctor about cialis for daily use and a 30-tablet free trial. it's lots of things. all waking up. ♪ becoming part of the global phenomenon we call the internet of everything. ♪ trees will talk to networks will talk to scientists about climate change. cars will talk to road sensors will talk to stoplights about traffic efficiency. the ambulance will talk to patient records will talk to doctors about saving lives. it's going to be amazing. and exciting. and maybe, most remarkably, not that far away. the next big thing? we're going to wake the wor